The Jack in the Box mod for 1.7.10 adds a variety of boxes with different abilities. They can spawn mobs, items, effects, and more.
Villager in a Box – Spawns a random Villager
Hostile/Neutral/Tamable/Animals in a Box – Spawns a mob depending on the type of box
Bosses in a Box – Randomly spawns 1 of 3 possible bosses
Weapons/Tools in a Box – Gives you an item depending on the type of box
Ores in a Box – Gives you a random ore
Effects in a Box – Applies a random potion effect to you
Foods in a Box – Gives you random food
Biomes in a Box – Gives you five random blocks depending on the biome...